January
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| PHUNT | 50 miles, 50K, 25K | Fair Hill State Natural Arena, Elkton | MD |
February
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Chilly Cheeks | 10K | Reading | PA | |
| Squirelly Tail Twail Wun | 1/2 Marathon | Gifford Pinchot State Park, Lewisberry | PA | |
| Naked Bavarian | 20 & 40 miles | Leesport | PA | |
| The Frozen Snot | 8.3 & 13.5 miles | McElhattan | PA |
March
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Buck Ridge Burn | 5K, 15K | Pine Grove Furnace State Park, Gardner | PA | |
| Snow Fest | 3.5 miles | RB Winter State Park – Mifflinburg | PA | |
| Ugly Mudder 10k Trail Race | 10K | Reading | PA | |
| Naked Prussian | 26.2 miles, 50 miles | Leesport | PA | |
| Buzzards Marathon | 26.2 miles | Dauphin | PA | |
| Geisinger Humdinger Trail Run | 7.1 miles | Danville | PA | Reg. before the race |
| 8K Perrydell Farms Mudfest | 8K | Perrydell Farm Store, York | PA | |
| Rockin’ The Ledges | 12mile-ish | Merli Sarnoski Park, Carbondale | PA | |
| The Hat Run | 50K | Susquehanna State Park, Havre de Grace | MD | Reg. 6 months Before |
| Tiadaghton Trail Challenge Spring Event | 13 miles | Mile Run exit (Exit 199 on Interstate 80) | PA | |
| Fire On The Rocks | 10K | McElhattan | PA |
April
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Half Wit Half Marathon | 1/2 Marathon | Reading | PA | |
| April Foolish | 10 hr | French Creek State Park | PA | |
| Eagleton Trail Challenge | 10K, 25K, 50K | Lock Haven | PA | |
| Gunpowder Keg Ultra | 25K, 50K | Gunpowder Falls State Park | MD | |
| Hyner View Challenge | 25K, 50K | Lock Haven | PA | |
| Night Flight Trail Run | 5K, 10K | Camp Mount Luther, Mifflinburg | PA | |
| Tough Mudder | 10K | Bear Creek Resort, Macungie | PA | Reg. as soon as it opens |
| Trail Triple Crown Marathon | 1/2 Marathon, 10K, 5K | Newark | DE | |
| Prettyboy Trail Race | 6 miles | Prettyboy Reservoir | PA | |
| Buck Ridge Burn | 1/2 Marathon, 5K | Pine Grove Furnace State Park | PA | |
| Gunpowder Keg Ultra | 50K, 25K | Gunpowder Falls State Park | MD |
May
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Mountain of Hope Trail Challenge | 1/2 Marathon | Mill Hall | PA | |
| Greenwood Furnace Trail Challenge | 1/2 Marathon | Greenwood Furnace State Park | PA | |
| Hills Creek Endurance Challenge | 3 hr, 6 hr, 12 hr | Hills Creek State Park | PA | |
| Chief Wetona Challenge | 7 miles, 14 miles | Mt. Pisgah State Park | PA | |
| Charlie Horse | 1/2 Marathon | Plowville | PA | |
| Rothrock Challenge | 25K | Boalsburg | PA | |
| Chobot Challenge | 15K | Birdsboro | PA | |
| Dirty German | 25K, 50K, 50 miles | Philadelphia | PA | |
| Holy Cowans Gap | 50K | Cowans Gap State Park | PA | |
| Bubbletown What The Duck Ultra | 12 hr | Boiling Springs | PA | |
| Keystone Backyard Ultra | Last Man Standing | Slatington | PA | |
| What Goes Up, Must Come Down | 5K | Palmerton | PA |
June
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Training Grounds Trail Run | 4 Miles | Denver | PA | |
| Slate Run 25K | 25K | Slate Run | PA | |
| World’s End Ultramarathon | 50K, 100K | World’s End State Park, (Forksville) | PA | Not for beginner Trail Runners |
| Laurel Highlands Ultra Races | 70.5 miles, 50K, relay | Ohiopyle | PA | Not for beginner Trail Runners |
| Mason Dixon Longest Day | 100K | Susquehanna Park, MD to Long Level | PA | |
| Smith Knob Scramble | 8 miles | Montoursville | PA | |
| Smith’s Challenge Trail Race | 7 miles (M) 5 miles (F) | Lancaster | PA | |
| Strip Mine 9 | 15K | Mt. Carmel | PA | |
| Wissahickon Trail Classic | 10K | Wissahickon Valley section of Fairmount Park, Philadelphia | PA | cancelled for 2021 |
| Sharp Top | 25K, 50K | Masten | PA | |
| Clear Creek Ultrafest | 34 miles, 21 miles | Sigel | PA | |
| Iron Run 1/2 Marathon & Charcoal Challenge 5K | 1/2 Marathon, 5K | Pine Grove Furnace State Park | PA | |
| On The Rocks Trail Run | 16.7K, 33.3K, 50K | York | PA | |
| Bayshore Bash Ultra Trail Run | 6 hr, 12 hr | Jonestown | PA | |
| Solstice Run | 5K, 10K | Mt Gretna | PA | |
| Prowl The Sproul | 10K | Lock Haven | PA | |
| Run for Ages 10K trail Run | 10K | Reading | PA |
July
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Catoctin 50K Trail Run & Half Cat | 50K, 25K | Gambrill State Park, Frederick | MD | Reg Starts 6/1 each year & Race fills up Fast. Not for beginner Trail Runners |
| Escarpment | 18.6 miles | Catskill Mountain, Windham & Haines Falles | NY | 5 hours away |
| March Creek Rapter | 5 or 10 miles | March Creek State Park, Dowingtown | PA | |
| Sweet Air Trail Race | ~7 miles | Gunpowder Falls State Park | MD |
August
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Eastern States | 100 miles | Waterville | PA | |
| Radnor Red Run | 5K – Steeple Chase | Radnor | PA | |
| Double Trouble | 15K, 30K | French Creek State Park, Morgantown | PA | |
| The Glow Burn Nighttime Trail Run | 5K, 10K, 15K | Palmerton | PA | |
| Cook Forest 25k Trail Challenge | 25K | Cooksburg | PA | |
| Hyner Half | 14 miles | North Bend | PA | |
| Hemlock Hoof It | 5K | Mifflintown | PA | |
| Rothrock | 5K, 10K | Boalsburg | PA |
September
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Conestoga Trail Run | 10 miles | Pequea to Holtwood | PA | |
| Dandelion Trail Run | 5K, 10K | Camp Mount Luther, Mifflinburg | PA | |
| Labor Pain Ultra | 12 hr | Reading | PA | |
| Boulder Field Ultra | 18 miles, 50K, 100K | Jim Thorpe | PA | |
| Ironmaster’s Challenge | 50K, 15K | Gardners | PA | |
| KTA Trail Challenge | 25K, 50K | Pequea | PA | |
| The Dam Half/Full Trail Marathon | Full/Half Marathon | RB Winter State Park – Mifflinburg | PA | |
| Trails 4 Tails | 40 miles, Relay | Hanover | PA | |
| Patapsco Trail Fest | 6K, 11K, Half/Full Marathon | Patapsco State Park | MD | |
| Boulder Beast | 24 miles, 25K | Lock Haven | PA | |
| World’s End Fall Classic | Half Marathon | Forksville | PA | |
| Blue Burn Trail Challenge | 4.5 miles | Palmerton | PA | |
| Sasquatch Preservation Trail Run | 5K & 10K | Seven Valleys | PA | |
| Jim Mayer Trail | 5K & 10K | Johnstown | PA |
October
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Blues Cruise | 50K | Reading | PA | |
| HARRC in The Park | 15K | Gifford Pinchot State Park, Lewisberry | PA | |
| Oil Creek 100 | 100 miles, 100k, 50k | Titusville | PA | Reg. mid March & 50K Race fills Quick |
| Black Forest 100K | 100K | North Bend | PA | |
| Tiadaghton Trail Challenge-Fall Event | 13 miles | Mile Run exit (Exit 199 on Interstate 80) | PA | |
| Little Pine 5-Miler Trail Run | 5 miles | Little Pine State Park, Waterville | PA | |
| Ives Run Trail Challenge | 4 miles | Tioga | PA | |
| Tussey Mountain Back Ultra Marathon & Relay | 50 miles (& relay) | Boalsburg | PA | |
| Tyler Arboretum 10K Trail Run | 10K | Media | PA | |
| Evansburg Challenge | 10 miles, 7K | Evansburg | PA | |
| Philadelphia Trail Marathon | Marathon | Philadelphia | PA | |
| The Raven | Half Marathon | Coburn | PA | |
| Highland Scramble | Half Marathon | Cooksburg | PA | |
| Green Monster | 15K, 25K, 50K | Wellsboro | PA | |
| The Call of The Wilds | 25K, 50K | Waterville | PA |
November
| Race name | Distance | City | State | Comments |
|---|---|---|---|---|
| Dirty Bird | 15K, 30K | French Creek State Park, Morgantown | PA | |
| Hex Hollow Half | 6.66K, 13.1 miles | Glen Rock | PA | |
| Twisted Turkey Trail Tussle | 1 mile, 10K, 10 miler | Strawberry Hill Nature Preserve, Gettsyburg | PA | |
| Pennypack Trail Fest | 20K, 40K, 60K | Philadelphia | PA | |
| The View | 25K | Hyner | PA |
York Road Runners Club 